* io.c (appendline): use READ_CHAR_PENDING_XXX macros and
  RSTRING_END().

* io.c (rb_io_getline_1): rewrite nested if statement into one
  statement.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41850 b2dd03c8-39d4-4d8f-98ff-823fe69b080e